Volume 41, Issue 4
  • ISSN: 0002-9637
  • E-ISSN: 1476-1645



To quantify the sensitivity of skin snips for the diagnosis of onchocerciasis, data collected over a 2 year period from 261 Liberians, 12–60 years of age, were examined. The overall sensitivity of 6 snips per person was estimated to be 91.6%. When the microfilariae density was ≥3.5 microfilariae/mg skin, there were no false negatives. At lower microfilaria densities, the sensitivity declined markedly. Furthermore, it was found that smaller and lighter snips were more likely to be classified as being falsely negative. The load of infection at the community level may be reduced after intervention strategies, such as vector control or community-based chemotherapy. Interpretation of the impact of these programs on the prevalence of infection should take into account the lower sensitivity of the skin snips at lower levels of infection.


Article metrics loading...

The graphs shown below represent data from March 2017
Loading full text...

Full text loading...

This is a required field
Please enter a valid email address
Approval was a Success
Invalid data
An Error Occurred
Approval was partially successful, following selected items could not be processed due to error